Bird of Paradise

"If you dye your hair wild colors, you can make the effect last longer by using a color-safe shampoo, like Wella Brilliance Shampoo for Colored Hair, or by rinsing your hair with cold water. Hot water opens the hair's cuticle so color can escape, but cool water will seal it in," Souleiman explains. Maarten van der Horst shirt, $439, and ruffle top, $390.